Engraver&#39;s tool sharpening machine



June 13, 1950 s. H. SPRINGMAN ENGRAVERS TOOL SHARPENING MACHINE Filed Aug. 15. 1949 attorney.

Patented June 13, 1950 UNITED STATES PTENT OFFICE ENGRAVERS TOOL SHARPENING MACHINE Sidney H. Springman, Torrance, Calif.

Application August 15, 1949, Serial No. 110,307

Claims.

This invention is a motor-powered grinding and finishing unit for the up-keep of various chisel and other type tools as commonly used by jewelers and engravers and other artisans.

Because of the very exacting, fine and tedious nature of tooling work performed by die-cutters, jewelers, engravers and other artisans it is very desirable to provide a compact, simple, sturdy, light-Weight and capacious self-powered unit by which desired faces and facets of a desired graving or other instrument may be rough dressed, then smoothed and finally polished if need be.

Further, a purpose of the invention is to provide a grinding and polishing or bufling unit in which there is provided a plurality of wheels whose tops are coplanar and all having vertical axes for the convenient shift of a tool being finished from coarse to fine or polishing wheels in a ready and fully controlled manner. And in this connection it is the intent of the invention to provide a simple and practical grinding and finishing unit in which there is incorporated a tool carrying device which will hold an applied tool while it is being pressed firmly onto one of the working wheels, and will provide for the instantaneous bodily shift of the tool from one wheel to another of the series of wheels while the tool is still held steady in the carrier itself so that there is no objectional change of the facet being treated other than toward or from the effective face of the adjacent wheel.

A provision is made by the invention for the application of tool shanks of various cross-section to the finishing unit, and for the application of tools of different thickness-from top to bottom, and for the secure vise-clamping thereof.

The invention resides in certain advancements in this art as set forth in the ensuing disclosure and has, with the above, additional objects and advantages as hereafter developed, and whose construction, combinations and details of means, and the manner of operation will be made manifest in the following description of the herewith illustrated embodiments; it being understood that modifications, variations and equivalents may be resorted to within the scope, spirit and principles of the invention as it is claimed in conclusion hereof. 7

Figure 1 is a perspective of the unit. Figure 2 is a partial longitudinal section axially of a rail elevating cam device. Figure 3 is a top plan of the tool vise of the unit, and Figure 4 is a vertical section thereof as gripping a tool. Figure 5 is a side elevation of an applicable tool, and Figure 6 illustrates cross-sections of divers tools grippable by the vise. Figure '7 is an elevation of a balland-socket form of tool gripper.

An appropriate frame 2 is of box form presenting a table 3 at the rear center of which is a fixed, upright bracket 5 to which is attached a verticalshaft motor 5 which is suitably geared or drivebelted a row of vertical shafts l mounted in the frame and projecting above the table and having secured on their top ends a coplanar series of grinding and finishing wheels 8 of different finishing factor on applied tools.

Means are provided whereby a selected tool T to be sharpened or dressed can be applied to any one of the several wheels in a firm and fully controlled manner, and be reciprocated to and fro on the top face of the used wheel for a fast, eflective, economic and true dressing motion of the tool by the operator. The invention contemplates a set of adaptable vises and a carrier therefor for the ready interposition of one or another of different-section shank tools.

At opposite, front corners of the table are fixed, short, vertical columns 9 whose inside faces have shallow, vertical, top pockets Ill into which can be seated, at will, a longitudinal rail II which, however, in Fig. 1, is lodged in deeper, open-top channels l2 which open through the table. In these channels are operative vertical jack posts l3 which support the ends of the applied rail and which constantly rest on rotary cams It constituting an elevator for bodily raising or lowering the horizontal rail, in its guide channels, as to the top plane of the set of treating wheels.

The rail is cylindrical and therefore can rotate on its own axis when so desired. On this rail there is slidably and rotatively mounted a substantial, C-form or opensided block I 5 whose top end has a split clamp l6 closable by a respective screw Hi.

It is desirable that a device of great tool gripping range may be easily and quickly applied to the carrier l5. One of such devices is shown in Figs. 3 and 4 and here embodies a substantial shell I! from opposite faces of which project fixed trunnions l8 which closely fit in the eye clamp l6 to operate as a fixed member of the block I 5 or carrier as it will hereinafter be called.

The shell has at its lower end an L-shaped bench jaw 51' (rigid with the shell) and on which may be lodged the shank of a selected tool T to be face-finished; the shank being in a position transverse to the shell and to the carrier rail for finishing operation. In the shell is provided a cross-stud l9 fitted in a longitudinal slot 208 in a floating, counter jaw 20 slidably guided between the side walls of the shell for movement toward or from the fixed jaw ll. The upper end of the jaw 20 is engaged by a, pillow member 2| whose upper end is supported on a pivot 22 fixed in the shell. The free end of the pillow is engageable by a, presser screw 23 threaded in the upper end of the shell. A light spring 24 fixed in the shell may be used to normally press the pillow upward from the jaw 28.

It will be seen that a great variety of tool shanks may be easily placed and secured in and between the cooperative vise jaws ll and 20, it being only necessary to regulate the adjustment of the presser screw as determined by the applied tool shank. It will be understood that the shell can be tilted on its trunnion axis in the shell as certain applied tools may need. After the tool has been clamped in the mounted vise (on the carrier) the carrier can be bodily tilted of the axis of the supporting rail so as to bring the desired face or facet of the tool into treatment contact with any one of the wheels, and can be quickly laterally shifted from one wheel to any other of the set with but little change of the angle of tilt of the tool shank as to the top plane of the wheels.

In Fig. '7 there is shown a tubular slide 25 having an upwardly projecting ball-and-socket clamp 28 into the ball of which may be diametrically passed the complementary shank of a tool T.

The cams I4 (one only being shown) are fixed on a shaft M having a fixed knob Mic for rotation thereof and having adjacent thereto a looking nut Min to jam against a near face of the frame of the machine.

What is claimed is:

1. A graving tool sharpener comprising, in combination, a set of finishing wheels having coplanar, effective faces and drive shafts for the wheels, a frame bearing the said shafts and having a, rocking cam shaft, jack rods vertically 4 guided in the frame and operative by the said shaft, and a horizontal rail having vertical guided motion in the frame and resting on said rods for vertical shift by the cam shaft.

.2. The machine of claim 1; the said rail being readily bodily removable from the frame and being rockable on the rods.

3. The machine of claim 1; the said rail being rockable on the rods, and a vise device mounted slidably on the rail and being tiltable thereon to tip an applied tool onto or from the Wheels.

4. In a graving tool sharpening machine; a dressing wheel, a tool carrier tiltable toward or from the effective face of the wheel and having means for clamping gravers of different shank section and including a shell having a fixed bench jaw, a floating toggle jaw in the shell, a pillow pivoted in the shell and engageable with the floating jaw, and a hand screw for forcing the pillow against the floating jaw to close the latter onto an interposed graver and hold it solidly on the bench jaw.

5. The machine of claim 4, and a spring normally moving the pillow from the floating jaw.

SIDNEY H. SPRINGMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 265,577 Carreer Oct. 10, 1882 1,675,981 Lees July 3, 1928 2,107,921 Weed Feb. 8, 1938 2,252,287 Helfgott Aug. 12, 1941 2,411,814 Sousa Nov. 26, 1946 FOREIGN PATENTS Number Country Date 644,321 France Oct. 5, 1928 

